1. Collina, Italy. 2. Donati Gomme S.R.L., Italy 3. Kleber, Italy. 4.M.A.L.Z. Di Alessandri F. Zini F. & C. Snc, Italy 5. Michelin Italiana Spa., Italy. 6. R.G.O. Sas Di Bergamini Dario & C., Italy 7. Titan Italia SpA, Italy.